package com.dries.security.core.component;

import cn.hutool.core.collection.CollUtil;
import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;

import java.util.Collection;

/**
 * @Description: 判断用户是否有访问权限
 * @Author ZSY
 * @createTime 2020/9/23 18:27
 */
@Component
public class CustomAccessDecisionManager implements AccessDecisionManager {
    @Override
    public void decide(Authentication authentication, Object obj, Collection<ConfigAttribute> collection) throws AccessDeniedException, InsufficientAuthenticationException {

        // 当接口未被配置资源时直接放行
        if (CollUtil.isEmpty(collection)) {
            return;
        }

        for (ConfigAttribute configAttribute : collection) {
            // 将访问所需资源或用户拥有资源进行比对
            String needAuthority = configAttribute.getAttribute();

            for (GrantedAuthority authority : authentication.getAuthorities()) {
                if (needAuthority.trim().equals(authority.getAuthority())) {
                    return;
                }
            }
        }

        throw new AccessDeniedException("抱歉，您没有访问权限");
    }

    @Override
    public boolean supports(ConfigAttribute configAttribute) {
        return true;
    }

    @Override
    public boolean supports(Class<?> aClass) {
        return true;
    }
}
